Updated examples to use Visual Studio 2019

[UebelAndre]

This also tracks the resolution of https://github.com/bazelbuild/continuous-integration/issues/1204. If this PR turns green then that issue is considered resolved.

[homuler]

I'm sorry if you already know how to resolve the build error. I'm not sure because I can't test it in the same environment, but I think you also need to overwrite BAZEL_VC, because the path to VS2017 is set to it now.

BAZEL_VC=(C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC)

[github-actions[bot]]

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